PHOENIX — The Rockies' 5-4 win Tuesday night against the Arizona Diamondbacks was tainted by the scene of right-hander Tyler Chatwood being escorted off the mound by manager Walt Weiss and head trainer Keith Dugger in the sixth inning.

The Rockies won the game — and clinched their fourth consecutive series — on a home run to right by Drew Stubbs in the ninth inning off Addison Reed. It was Stubbs' first homer this year. Then Stubbs protected the lead with a great catch in center field of a deep drive by Arizona's Eric Chavez with two on base to end the game.

"(Reed) kind of left a slider that was hanging over the edge of the plate, and it tried to go the other way with it," Stubbs said of his game-winning homer.

Troy Tulowitzki, in the middle of a classic Tulo hot streak, was thrilled to see Stubbs, who hasn't gotten consistent playing time, come through.

"Stubbs is definitely a friend of mine and I've know him a long time," Tulo said. "He's a great guy. I can't say enough good things about him, so it was nice to see him put together a good at-bat and make a big defensive play."

Manager Walt Weiss, who inserted Stubbs into the game with a double switch in the eighth inning, was thrilled with how Stubbs came through as the Rockies won for the 10th time in their last 14 games.

"We all know about Drew's talent, and he's been in a tough spot with so many guys playing well in front of him," Weiss said. "Tonight, he won a ballgame for us, along with a bunch of other guys.

"He had a big shot late and he ran that ball down in center field, which he does so well. Chavez hit that ball well, but it was a big-time performance by Stubbs."

The Rockies' clubhouse was a festive place after the game, but Chatwood's injury is cause for real concern as the club moves forward.

"Chatty had tightness in his right elbow and we wanted to get him out of there at that point," Weiss said. "We will reevaluate him tomorrow."

Weiss said he didn't know if an MRI will be required. Chatwood had surgery last October to remove a bone chip in his right elbow. He also missed 28 days last season because of tightness in his elbow.

Chatwood left a mess for reliever Chris Martin to clean up, and Martin did a spotless job. He got Chris Owings to ground out to third baseman Nolan Arenado, who threw to the plate for the force out. Then Martin struck out pinch-hitter Roger Kieschnick and induced Tony Campana to hitter a chopper to first.

"I was already warm when they took Chatty out so I was ready to go," Martin said. "I came in looking to get a groundball out and the first out to (Owens) worked out exactly like I wanted."

Said Weiss: "He came into a tough spot ... but he was fantastic. It doesn't get any tougher than that, with the bases loaded and nobody out. But he came in with hard and heavy sink and he did a hell of a job."

Lefty Rex Brothers then came in and pitched a 1-2-3 seventh. But but Boone Logan gave up a game-tying homer off the left-field foul pole to A.J. Pollock in the eighth. LaTroy Hawkins allowed two men to reach in the ninth but recorded the save when Stubbs made is catch in center. Hawkins is 9-for-9 in save opportunities this season.

Colorado Rockies' Tyler Chatwood throws a pitch against the Arizona Diamondbacks during the first inning of a baseball game on Tuesday, April 29, 2014, in Phoenix, Ariz. (Ross D. Franklin, The Associated Press)

The Rockies have managed to compile a 16-12 record despite losing two starting pitchers to injury. Right-hander Jhoulys Chacin had a strained right shoulder during spring training and just finished his rehab starts. He could rejoin the rotation as soon as this weekend. Left-hander Brett Anderson made just three starts before he broke the index finger of his left hand. He's on the 60-day disabled list and could be out until the all-star break.

Meanwhile, the middle of the Rockies' order continues to pillage opposing pitchers.

The Rockies tied the game 2-2 in the fourth on a single by Tulowitzki, a triple by Justin Morneau and a single by Arenado. The Gold Glove third baseman extended his hitting streak to 19 games, best in the majors this season, while Morneau's streak grew to 13.

The Rockies regained the lead at 4-3 in the sixth on a screaming two-run homer by Tulo that nearly splashed down in the party pool in right center. Tulowitzki drove in Carlos Gonzalez, who showed signs he's coming out of his slump with a line-drive double to right.

Tulo has five home runs and 10 RBIs in his last seven games. His 22 RBIs this month are tied for his most ever before May. He also drove in 22 runs in April last season.

The numbers are fine, but Tulo is most happy about the way the team is pulling together, especially on the road where they are now 8-8.

"I think right now you see signs of the group coming together and they know what it takes to win," he said. "I see young guys buying into preparing and doing all the things it takes to win. That's what we've been trying to accomplish the last few years. I think this group has a firm grip on that and it's important to me."

Before leaving the game, Chatwood experienced an uneven night. He was a groundball machine in the first, setting the Diamondbacks down in order. But then he started leaving pitches up in the zone, and the Diamondbacks struck quickly in the second. A leadoff double by Miguel Montero, a wild throw by Chatwood on a pickoff attempt, a walk and a double by Owings put Arizona in front 2-0.

A leadoff double by Aaron Hill and an RBI single by Chavez gave Arizona a short-lived 3-2 lead in the fourth.

Rockies are on pace to lose 93 games this seasonThe Rockies lost three of four in St. Louis and are on pace to lose 93 games as they come home for a three-game series with Seattle before going back on the road again to face Washington.